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18-8 SS Socket Set Screw

Selected 18-8 Stainless Steel Hex Socket Cap Screw18-8 SS Socket Set Screw
18-8 Stainless Steel Hex Socket Cap Screw18-8 SS Socket Set Screw

ASTM F880 stainless steel socket set screws are a headless fastener threaded its entire length (except for the point) used commonly for fastening mated parts such as a shaft and collar. The F912 specification covers the requirements for austenitic grade stainless steel socket-set screws. Dimensional specifications are governed by ASME B18.3. The socket set screw's headless design allows the fastener to sit flush, or inset, into the threaded part. Stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resistance, such as chemical and food processing equipment. Stainless steel has a higher corrosion resistance than carbon steel.

 

Products

Governing Standards

ASTM F880 This specification covers the requirements for austenitic grade stainless steel socket-set screws (SSS) sizes 0.060 through 1.000 in. square head set screws (SHSS) sizes 0.190 through 1.500 in., and slotted headless set screws (HSS) 0.060 through 0.750 in., in two conditions, AF and CW.
ASME B18.3 Covers the complete general and dimensional data for various types of hexagon socket cap screws, shoulder screws, set screws, and hexagon keys recognized as an American National Standard.
ASME B1.1 UNC & UNF Class 2A Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

Socket Set Screw Head Marking
Stainless Steel Socket Set Screw requires no material marking

Dimensional Specifications

Socket Set Screw dimensions
Per ASME B18.3-2012
Size Nominal UNC UNF J T C Oval Point
Radius		 Cone Point
Angles
Hex Socket Size Key
Engagement		 Cup & Flat Point
Diameters
Fraction
Nominal		 Decimal
Nominal		 Min Max Min Basic 90 Deg
Lengths
#0 0.0600   80 …. 0.0280 0.0500 0.0330 0.0270 0.0450 0.0900
#1 0.0730 64 72 …. 0.0350 0.0600 0.0400 0.0330 0.0550 0.0900
#2 0.0860 56 64 …. 0.0350 0.0600 0.0470 0.0390 0.0640 0.1300
#3 0.0990 48 56 …. 0.0500 0.0700 0.0540 0.0445 0.0740 0.1300
#4 0.1120 40 48 …. 0.0500 0.0700 0.0610 0.0510 0.0840 0.1900
#5 0.1250 40 44 1/8 0.0620 0.0800 0.0670 0.0570 0.0940 0.1900
#6 0.1380 32 40 1/8 0.0620 0.0800 0.0740 0.0640 0.1040 0.1900
#8 0.1640 32 36 5/64 0.0780 0.0900 0.0870 0.0760 0.1230 0.2500
#10 0.1900 24 32 3/32 0.0940 0.1000 0.1020 0.0880 0.1420 0.2500
1/4 0.2500 20 28 1/8 0.1250 0.1250 0.1320 0.0118 0.1880 0.3100
5/16 0.3125 18 24 5/32 0.1560 0.1560 0.1720 0.1560 0.2340 0.3800
3/8 0.3750 16 24 3/16 0.1880 0.1880 0.2120 0.1940 0.2810 0.4400
7/16 0.4375 14 20 7/32 0.2190 0.2190 0.2520 0.2320 0.3280 0.5000
1/2 0.5000 13 20 1/4 0.2500 0.2500 0.2910 0.2700 0.3750 0.5700
5/8 0.6250 11 18 5/16 0.3120 0.3120 0.3710 0.3470 0.4690 0.7500
3/4 0.7500 10 16 3/8 0.3750 0.3750 0.4500 0.4250 0.5620 0.8800
7/8 0.8750 9 14 1/2 0.5000 0.5000 0.5300 0.5020 0.6560 1.0000
1 1.0000 8 14 9/16 0.5620 0.5620 0.6090 0.5790 0.7500 1.1300
1 1/8 1.1250 7 12 9/16 0.5620 0.5620 0.6890 0.6550 0.8440 1.2500
1 1/4 1.2500 7 12 5/8 0.6250 0.6250 0.7670 0.7330 0.9380 1.5000
1 3/8 1.3750 7 12 5/8 0.6250 0.6250 0.8480 0.8080 1.0310 1.6300
1 1/2 1.5000 6 12 3/4 0.7500 0.7500 0.9260 0.8860 1.1250 1.7500
1 3/4 1.7500 5 12 1 1.0000 1.0000 1.0890 1.0390 1.3120 2.0000
2 2.0000 4 12 1 1.0000 1.0000 1.2440 1.1930 1.5000 2.2500
  1. All dimensions are in inches.

Chemical Properties

Per ASTM F880-12
Material Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Copper
% by weight % by weight % by weight % by weight % by weight % by weight % by weight % by weight
UNS S30400 0.08 2.00 0.045 0.030 1.00 18.0 to 20.0 8.0 to 10.5 1.00
  1. Composition, % maximum except as shown.

Mechanical Properties

Per ASTM F880-12
Austenitic Grade
Stainless Steel		 Rockwell
Hardness Limits		 Vickers
Hardness Limits
Condition AF 70 to 95 HRB 125 to 210 DPH
Condition CW 96 HRB to 33 HRC 216 to 327 DPH